A.O. Smith 186965-001, 505 Series 100, 705 Series 100, 305 Series 100 manual Primary Sub

On-Demand
Equipment List	QTY
On-Demand	2
Water Heaters

Electronic Connection *

* Refer to On-Demand Accessories and Model Applicability for electronic connection details.

On-Demand	On-Demand
Water Heater	Water Heater

Primary Sub 1

Gas Supply

Cold Water Supply Line

Hot Water Supply Line

Domestic Hot Water - Standard Installation

2 On-Demand Water Heaters

Preferred Piping Installation

Key

3/4" Ball Valve

3/4" Union

Check Valve

Pressure Relief Valve

Pressure Regulator

Circulating Pump

S

Boiler Drain Valve

Solenoid Valve Mixing Valve

NOTE: This drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with local building officials before installation. The Contractor or engineer is to determine the necessary components and configuration of the particular system to be in- stalled. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes..

Drawing Date:

September 07, 2008

Drawing Number:

H-2

15